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19 papers · 2 filters
Electric-dipole active two-magnon excitation in {\textit{ab}} spiral spin phase of a ferroelectric magnet GdTbMnO
N. Kida, Y. Yamasaki, R. Shimano +2
A broad continuum-like spin excitation (1--10 meV) with a peak structure around 2.4 meV has been observed in the ferroelectric spiral spin phase of GdTbMnO…
Metal-insulator transition in superlattices
Shuai Dong, Rong Yu, Seiji Yunoki +3
The modulation of charge density and spin order in (LaMnO)/(SrMnO) (=1-4) superlattices is studied via Monte Carlo simulations of the double-exchange model. G…
Finite-Temperature Mott Transition in Two-Dimensional Frustrated Hubbard Models
Takuma Ohashi, Tsutomu Momoi, Hirokazu Tsunetsugu +1
We investigate the Hubbard model on two typical frustrated lattices in two dimensions, the kagome lattice and the anisotropic triangular lattice, by means of the cellular dynamical…
Novel Quantum Criticality in CeRuSi near Absolute Zero Observed by Thermal Expansion and Magnetostriction
J. Yoshida, S. Abe, D. Takahashi +6
We report linear thermal expansion and magnetostriction measurements for CeRuSi in magnetic fields up to 52.6 mT and at temperatures down to 1 mK. At high temperatures, thi…
Enhanced spin Hall effect by resonant skew scattering in orbital-selective Kondo effect
Guang-Yu Guo, Sadamichi Maekawa, Naoto Nagaosa
The enhanced spin Hall effect in Au metal due to the resonant skew scattering is studied with first-principles band structure calculations. Especially the gigantic spin Hall angle…
Quantum spin Hall effect in a transition metal oxide Na2IrO3
Atsuo Shitade, Hosho Katsura, Jan Kunes +3
We study theoretically the electronic states in a transition metal oxide NaIrO, in which both the spin-orbit interaction and the electron correlation play crucial role…